448 
NITROGEN, ETC., IN Borrom Mups, 1913—1914, 
InLinois RrvER CHANNEL AND LAKES IN VICINITY OF HAVANA 
E Total 
Nitrogen pase oxidizable 
matter 
: T 2 T * yt 
River channel Chillicothe to | .247 100 1.87 100 6.32 100 
Kampsville 
River channel, above Havana | .306 123 2.41 128 7.71 121 
River channel, below Havana | .189 76 1.51 80 4.25 67 
Eleven lakes, vicinity of Ha- | .320 129 3.87 206 
vana, middle 
Thompson Lake, middle 325 131 4.83 258 
Thompson Lake, shore, 1—6 ft. | .428 173 5.56 297 
Thompson Lake, all depths foe 15a! 5.17 276 
Quiver Lake, middle .320 129 3.46 185 
Quiver Lake, shore, 1—6 ft. | .440 178 Dak 281 
Quiver Lake, all depths 400 161 4.67 249 
The Plankton and other Limnetic Oxidizable Matters carried 
by the Illinois River Channel at Chillicothe and Havana, 
1909—1914 
1. Stocks oF PLANKTON CARRIED PAST HAVANA 
SEPTEMBER, 1909—Avueust, 1910 
Calculations of the total plankton that passed Havana September, 
1909—August, 1910, from the silk-net figures of that year, increased in 
*This column gives per cent. in terms of dry matter. 
7 This column gives percentage on base of Illinois River channel, Chillicothe 
to Kampsville. 
